PROTECTION VAA Auxilliary Relays and will withstand an operation of upto 600 per hour. General description VAA relays are voltage operated relays. The relays are attracted armature units of compact design with positive action and a high degree of mechanical stability. The relays can be supplied with self, or hand reset contacts and changeover contacts. See table 1 Standard contacts are of silver/copper alloy. They are shaped and positioned to ensure a reliable and low resistance normally open or normally closed contact. Standard VAA 11/21 relays are suitable for ac/dc supply and standard VAA 13/23 relays are suitable for dc supply only. Type VAA Auxiliary Relays Features • Simple and robust construction • Positive action and high mechanical stability • Heavy duty contact available, where required • Slugged relays with delay on operation / reset available in ac/dc version. Application Control, alarm, indication and other auxiliary duties in ac or dc systems. The type VAA Plug-in-relays is specially designed for industrial control duties requiring respetitive switching operations. It is capable of providing over 5 million operations without servicing or drop-off can be supplied on specific request. Similarly relays with magnetic blow out contacts can also be supplied on specific request. The standard VAA relays provide only instantaneous self or hand reset contacts. To ensure a longer operating life, the tips of the silver contacts have a domed profile, the optimum design for the repetitive operation duties of industrial applications. Although the standard designs are suitable for dc and full-wave rectified ac systems only, alternative versions for ac operation are available. VAA21/22/23 are double pole versions of VAA 11/12/13 respectively. VAA 31/33 are Triple pole versions of VAA 11/12/13 respectively. When it is necessary to break heavy or highly inductive dc loads, heavy duty magnetic blow out type contacts can be provided. These contacts use the magnetic field of a small permanent magnet to force the arc onto the arcing horns away from the contact tips. The breaking capacity of the heavy duty contact is shown by the curves in Figure 1. Auxiliary relays with delay on pick-up Customer Benefits • Auxiliary relay • Simple and robust construction • More number of contact configurations available with self/hand reset facility • Operation annunciation in the form of flag • Completely dust proof by IP5X class protection GRID 1 VAA Technical data Coil rating DC VAA operates satisfactorily between 75%-120% of rated volts. AC VAA operates satisfactorily between 80% -115% of rated volts. Minimum operating voltage Not greater than 70% voltage rating. Operating times VAA 15-20 ms typical minimum at nominal voltage Burdens VAA 11 3 watts for 30, 125V 6 watts for 50, 250V VAA ‘Plug’ in: Nominal 3 watts Contacts case & operation indicators Relay type Standard contacts Contact reset Case size ¼ N(15T) Operation indicator VAA 11 6 N/O, 2 N/O+ 2 C/O, 3 N/O + 3 N/C, 2 N/O + 4 N/C Self reset VAA 12 4 N/O, 3 N/O + 1 N/C, 2 N/O + 2 N/C Self and hand reset ¼ N(10T) Mechanically operated hand reset VAA 13 4 N/O, 3 N/O +1 N/C, 2 N/O + 2 C/O Hand reset Mechanically operated hand reset. ¼ N (15T) Either no flag or a mechanically operated hand reset flag provided 1. Contact ratings 2. Type of Contact Current Make and carry continuously Make and carry 3. for 3 seconds Break Standard AC 1250VA with maxima of 5A and 660V 7500VA with maxima of 30A and 660V 1250VA with maxima of 5A and 660V Standard DC 1250 with maxima of 5A and 660V 7500W with maxima of 30A and 660V 100W (resistive) or 50W (inductive) with maxima of 5A and 660V VAA in magnetic blow-out Contact ratings Make and carry continuously 1875W with maxima of 7.5A and 660V Make and carry for 3 seconds Break 7500W with maxima Details on application. of 30A and 660V Please state duty etc. Maximum rate of operations: 600 per hour Insulation The relay meets the requirements of IS 3231 1965/EC 255-5 series C-2 kV for 1 minute. Figure 1 1: Curve showing breaking capacity of magnetic blowout contacts 2 VAA Figure 2 : Case and panel cut-out dimensions for case 1/4 N ( all dimensions in mm) Information Relay Type: required with your order VAA11 Relay Type: Case: VAA11 1/4N 15Terminals Case: Auxiliary Voltage: 1/4N 15Terminals YF 24-30VdcVoltage: / 48-54Vdc Auxiliary 110-125Vdc / 220-250 Vdc 24-30Vdc / 48-54Vdc 110-125Vac// 220-250 220-250Vdc Vac 110-125Vdc YF 025 075 025 575 075 Contact Combination: 110-125Vac / 220-250 Vac 6 N/O Combination: Contact N/O + 2 C/O 62N/O N/O++23C/O N/C 23N/O 2 N/O + 4 N/C 3 N/O + 3 N/C 575 0 02 23 34 2Flag N/OOption: + 4 N/C Without flag Flag Option: With flag Without flag 4 A AB Issue:flag With Factory Defined Issue: B A Factory Defined A VAA 11 Without Time delay on Drop off VAA 11 Without Time delay on Drop off Relay Type: VAA11 Relay Type: Case: VAA11 1/4N 15Terminals Case: Auxiliary Voltage: 1/4N 15Terminals YF 110-125Vdc / 220-250 Vdc Auxiliary Voltage: 110-125Vac// 220-250 220-250Vdc Vac 110-125Vdc YF 875 775 875 Contact Combination: 110-125Vac / 220-250 Vac 2 N/O +Combination: 2 C/O Contact 775 2 2Flag N/OOption: + 2 C/O Reverse flag Flag Option: 2 C Issue: flag Reverse Factory Defined Issue: C A Factory Defined A VAA 11 With Time delay on Drop-off - 100ms±20ms VAA 11 With Time delay on Drop-off - 100ms±20ms 3 Relay Type: 1/4N 10Terminals 24-30Vdc 48-50Vdc 110-125Vdc 220-250Vdc 2N/O self reset 2N/O Hand reset 2 N/O self reset 1 N/O 1N/C hand reset 1 N/O 1 N/C self reset 1 N/O 1N/C hand reset With flag Factory Defined Relay Type: 1/4N 15Terminals 24-30Vdc/48-50Vdc 110-125Vdc/220-250Vdc 110-125Vac/220-250ac 4 N/O 3 N/O 1N/C 2 N/O 2 C/O With flag Factory Defined www.grid.alstom.com 0 1 2 Flag Option: Issue: B A VAA13 Case: Auxiliary Voltage: YF 025 075 575 Contact Combination: 0 1 2 Flag Option: Issue: B A ALSTOM T&D INDIA LIMITED Pallavaram Works 19/1, G.S.T. Road, Pallavaram, Chennai - 600 043 Tel: 91-44-2264 8000 Fax: 91-44-2264 0040 “Alstom logo and any alternative version thereof are trademarks and service marks of Alstom. The other names mentioned, registered or not, are the property of their respective companies. The technical and other data contained in the document are provided for information only. Neither ALSTOM, its officers nor employees accept responsibility for or should be taken as making any representation or warranty (whether express or implied) as to the accuracy or completeness of such data or the achievements of any projected performance criteria where these are indicated. No liability is accepted for any reliance placed upon the information contained in this brochure. Alstom reserves the right to revise or change these data at any time without further notice.” VAA VAA12 Case: YF Auxiliary Voltage: 025 050 075 010 Contact Combination: ALSTOM T&D Worldwide Contact Centre: http://www.alstom.com/contactcentre/ Tel.: +44 (0) 1785 250 070 GRID 4